Broaching-machine attachment for splitting piston-rings.



M. J. ACTON. I v BROACHING MACIIINE ATTACHMENT FOR SPLITTINC PISTON RINGS.

APPLICATION FILED "AV 2. I9l8.

Patent-ed Jan. 21,1919.

' the attachment consists of a circular section, of

which is faced off at 14 caps "'18 STATES PATENT OFFICE.

MICHAEL J. ACTON, OF 7 MACHINE TOOL COMPANY, OF MASSACHUSETTS. I

230A me-uacnnm ur'racnmrm'r r'on.

FBAMIIN'GHAH, MASSACHUSETTS, ASSIGNOB TO LAIOINTE HUDSOIE. MASSACHUSETTS, A CORPORATION OF SPLITTING PISTON-RINGS.

Appueation med Kay 2,

To all whom it may concern:

Be it known that 1, MICHAEL J. ACTON, a citizen of the United States, residing at Framingham, in the county of Midd-lesex and State of Massachusetts, have invented a new and useful Broaching-Machine Attachment for Splitting Piston-Rings, of which the following is a specification.

The object of this invention is to provide a new and improved attachment by which piston rings can cut. The attachment is designed to go on a broaching machine of ordinary or aproved form, such as is shown for example in my companion apdate herewith, Serial No. 232,130.

The attachment is illustrated in the accompanyingdrawing, referring to which- Figure 1 is a, side elevation of my attach: ment; V

Fig. 2 is an end elevation;

Fig. 3 is a bottom plan view, partly in the parts shown in Fig. 1;

Fig. 4 is a sectional the line 4 4 of Fig. 2, and

Fig. 5 is a detail perspective split piston rings.

Referring to the drawings,

and in detail, base 10 having a bushing 11, which is ada ted to fit into the hole in the face plate 0 the breaching machine. The base is irovided with notches 12-12 for receiving 0 amping I screw-s so that the attachment can be firmly held in position. 4

Extending from the base 10 is a block 13 at the angle which it is desired the cutthrough the piston ring shall bear to the plane faces thereof. x-

10 and fitted'in the block 13 is a partial circular cutter supportinghub 15 which is secured in position by a screw 150. The hob 15 has an upwardly extending' tenon 16 and a groove 17 ecured on top of the hub 15 are two triangular sectioned or cut-away caps 18 which are held in position on the hub 15 by screws 19. The cutter bar or broaching tool which has extending cutting'or sawteeth a is adapted to fit into the groove 17 and the 18 are shaped to hold the cutter bar in osition. The piston ,rings P rest on top of the trianglar caps 18 and may be clamped in position at the proper angle to Specification of Letters Patent.

be spl't with an oblique lication filed "on even' clmed engagmg surface 2 elevation taken on of one of the tightly on Patented J an. 21, 1919.

1918. Serial No. 282,129.

the travel of the broaching tool A by reason of the shape of said caps.

Extending from the base 10 is a projection 20, which has a groove 21, fitted in which is a clamping block 22 having a groove in which the teeth of the cutter A can work. The clamping block is adjusted by means. of screws 23 threaded into the projection 20.

A positioning or supporting i e 24 is adjustably secured to the base 10 y a screw 25 fitting in a slot in the foot oft-he piece 24. A clamping piece 6 is fitted in a groove on the inside face of the supporting piece 24, which clamping iece has an incorresponding to the angle which the piston rings are to occupy. The clamping piece has a screw 28 extending through a notch in the supportingpiece 24 and is provided with a nut 29 on its end.

A supporting piece 30 is adjustably. secured to the block 13 by means of a screw 31 fitting in a slot in its foot. A clamping piece 32 having an angular engaging face 33 shaped to engage the piston rings is fitted in a groove in the top of the supporting piece 30 and is held in place by a screw 34 extending through a notch in the supporting piece 30 and having a nut 35 on its end. f

The operation is as follows: The supporting or clamping pieces 24 and 30 are moved outwardly or away from the hub 15 by loosening screws 25 and 31, and the clamping ieces and 32 are removed. unch of piston rings P is then slid in position on the triangular caps 18-18 until the innermost ring on ages the angular face 14 of the block 13. e clamping or supporting pieces 24 a d 30 are then. brought tightly against the piston rings, and screws 25 an 31 tightened, and the clamping pieces 26 and. 32 are then adjusted to engage the piston rings, and nuts 29 and 35 tightened, and the clamping block 22 is also adjusted down the piston rings. This will hold the bunch of piston rings tightly at the de sred angle.

The machine is then started in operation, and the breaching tool is draw forward through the attachment, severin the piston rings with a kerf or cut whic will give two angular opposing faces trated in Fig. 5.

p and p as illus-" It Will 'be noted that when the piston rings are clamped in position, their central points 'will come in a straight line and the plane faces of the rings will be inclined relatively to this straight line. It also will be noted that the cutter supporting and guiding means is arranged so that the cutter Will be constrained 'tomove through the piston rings on a line parallel with said straight line. In detail, this relative arrangement is obtained by the block, the hub extending therefrom constructed to support and guide the cutter in a strai ht line, the block being inclined or faced 0 at an angle relatively to said line, and by the means for clamping the plurality ofpiston rings on said hub against the inclined face of said block.

By the attachment described, a great deal of Work can be rapidly turned out as a large number of piston rings can be severed on an inclinedcut at one operation. The attachment can be adjusted to hold rings which are considerably larger or eter than those illustrated.

he details and arrangements herein shown and described may be greatly varied by a skilled mechanic "without departing from the scope of my invention as expressed in the claim. Having thus what I claim and aten't is 1. A broachin machine attachment comprising means Eor holding a plurality 'of piston rings so that their central points will be in a straight line and so that the plane faces of said rings tively to said line, and means for supporting and guiding a cutter so that it can be drawn through said plurality of rings on a line parallel with sai straight line to split the described my invention, desire to secure by Letters rings obliquely.

broaching machine attachment comprising a supporting hub so that their central points will be in a straight line and so that the plane faces of said rings will be inclined relatively to said line, said hub being formed and constructed to support and guide a cutter so that it can e drawn through said plurality of rings on a line parallel with said'straight line to split the rings obliquely. 1

\ 3. A broaching machine attachment comsmaller in diam- 9 will be inclined relahaving means for, clamping a plurality of piston rings thereon ing block ream-0o prising a block, a hub extending therefrom and constructed to support and ter in a straight line, said block being inclined or faced off at an angle relatively to said line, and means for clamping a plurality (of piston rings on said hub and against the inclined face of said block.

4. A broaching machine attachment comprising a bloc a hub extending therefrom, caps on said hu the hub and caps being arranged and constructed to support and guide a cutter in a straight line, said block being inclined or faced ofi' at an tively to said line, and means for clamping a plurality of piston rings on said hub and against the inclined face of said block.

5. A broaching machine attachment compieces having angular faces arranged to clamp and secure a plurality of piston rings in position on the hub and against the angular face of the block.

6. A broaching machine attachment comprising a block, a hub extending therefrom, caps secured to said hub, the hub and caps being constructed 'to support and guide a cutter in a straight line and ing cut away so that aplurality rings can be placed thereon at an angle to the travel of the cutter, and means for clamping and holding the pistonrings in place on the hub caps sothat their central points will be in a straight line and so that the plane faces of said rings-will be 'inclined relatively to said line.

A broaching machine attachment comprising a block,

the hub and capsbeing constructed to support and guide a cutter in a straight line, said block being inclined or faoed ofl' at an angle relatively to said line, adjustable supporting pieces having clamping pieces with angular faces coeperating' therewith, and an extendprojection having arranged above the cutter supporting hub.

In testimony whereof I aflixed my signature.

MICHAEL J. ACTON.

guide a cutsaid caps beof piston a grooved clamping a hub extending therefrom,- cut-away caps secured to the top of said hub,

have hereunto 

